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本文用批实验法和选择性提取法研究了有机质 ( OM)和 Ca CO3 对 Np( )在黄土上的吸附影响 ,测定了在未处理黄土和去除 Ca CO3 、去除 OM、去除 Ca CO3 和 OM三种处理黄土上 Np( )的吸附和解吸等温线 ,并用 Fre-undlich方程进行了分析。结果表明 ,Ca CO3 对 Np( )在黄土上的吸附 /解吸滞后有一定影响 ,对 Np( )的吸附有负贡献 ;OM对 Np( )在黄土上的吸附 /解吸滞后没有影响 ,且对 Np( )的吸附影响很小 ;溶液中的腐殖酸 FA或CO3 2 -对 Np( )的吸附有明显的正作用 ;Np( )在黄土上的吸附主要受粘土矿物成分的影响 ;Np( )在黄土中的迁移滞后现象应予以考虑。
The effects of organic matter (OM) and CaCO3 on the adsorption of Np (¢ ó) on loess were investigated by batch experiments and selective extraction. The effects of organic matter (OM) and CaCO3 on the adsorption of loess were studied. The adsorption and desorption isotherms of Np () on loess were studied and analyzed by Fre-undlich equation. The results showed that CaCO3 had some influence on the adsorption / desorption lag of Np () on loess and negative contribution to the adsorption of Np (); OM had no effect on the adsorption / desorption lag of Np () on loess, The adsorption of Np () on loess was mainly affected by the composition of clay minerals. Np () The migration lag in loess should be considered.